Cascaded Interleaved DC–DC Converter for a Bidirectional Electric Vehicle Charging Station

This project presents the dc–dc bidirectional step-up interleaved converter coupled by a central capacitor in a cascaded topology is used as a bidirectional electric vehicle charging station for charging and discharging the battery of an electric vehicle. In this article, a unified (coupled) model is proposed combining all switching intervals in a single model, allowing the accurate analysis and a better design for the controllers. In addition, this solution enables not only stage 1 to regulate the dc-link voltage on the terminals of stage 2 but also to use a classical proportional– integral controller or an adaptive state-of-charge-sharing function as a control structure. The simulation results can be evaluated by using Matlab/Simulink Software.

Keywords: Bidirectional electric station, dc microgrid, electric vehicles (EVs), grid-to-vehicle (G2V), interleaved dc–dc converter, two-stage converters, vehicle-to-grid (V2G).